Sound pedal



FIG. 1 is a front view of a sound pedal showing the claimed design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top left perspective view thereof.

The dashed broken lines in the figures show portions of the sound pedal subject matter that form no part of the claimed design. 

CLAIM The ornamental design for a sound pedal, as shown and described. 